Safety aas-cogk



G. H. HARRIS.

SAFETY GAS COCK.

APPLICATION FILED SEPT. 21, 1915.

Patented Dec. 16, 1919.

INVENTOR GEORGE H. HARRIS ATTORNEY UNITED STATES PATENT onrio GEORGE E. HARRIS, or rIoA, NEW YORK, nssreivon' TO UTICA VALVE AND FI TURE coMrA vY, oF'U'rI'cA, NEW YORK.

SAFETY GAS-COCK.

Speeificationof Letters Patent.

Patented Dec. 16, 1919'.

Application filed September 21, 1915. Serial No. 51,865.

the same, reference being had to the accomaan in drawin s in which like reference 1 b O characters refer to like parts throughout thespecification. V

The object of the invention is to. provide an eflicient safety gas cock of simple construction adapted to automatically stop and lock the key of the cock in either its open or its closed position. This feature being highly important in view of the manyharmful contingencies that may arise unlessthe operator knows the condition of the cock, after he has turned the key. Furthermore, there is also means for locking the key of the cock in any location between the open and closed position.

The value of the automatic stopping and locking feature of the key of the cock over the old style pin employed has a material advantage. 7 In the cock, as heretofore constructed, the pin was forced into the key or plug of the cock, so as to forma drive fit therein. It would oftentimes work loose and plane over in such a manner that it performed its function improperly or not at all. Moreover, the employment of the pin was expensive, inasmuch as it required six additional operations in the manufacture of the cock. In the present device, the pin is rendered unnecessary by the substitution of a lever whose end is adapted to abut against certain stops formed integral with the body or casing of the cock, whereby the key is automatically arrested in its turning movement in either the open or closed position.

This object is attained by the mechanism illustrated in the accompanying drawings, in which:

- Figure 1 is a side elevation of the safety gas cook,-

Fig.2 is a centralvertical section of the safety gas cook;

Fig. 3 1s a detail perspective VlGW'Of a key and immediate parts employed;

Fig. at is a perspective view of the easing of the safety gas cock;

Fig. 5 is a plan view of the casing shown in Fig. a;

Fig. 6 is anenlarged detail view of a washer employed.

Referring more particularly to the draw.- ings, the casing of the safety gas cock is represented by l, which has an enlarged threaded opening at 2 adapted forconnection with a gas pipe. A channel 3 leads from the opening 2 to the transversely disposed opening a, having the shape of a frustum of a cone, and being filled! by the correspon'dingly formed key 5, provided with a horizontal channel 6 adapted to aline, when turned at a given angle, with the channel 3.

The channel 3 is continued, in the casing 1-, at 7, whereby to lead to the enlarged channel 8 formed by the tapering portion 9 of the casing 1. The portion 9 is provided with the convolutions or ridges 10 for the better securing of a rubber gas pipe or other connecting body. i

- The key 5 has a lug or raised portion 30 with straight sides upon its upper end,

adapted to fit into the correspondingly shaped aperture 31 of the washer 11, and is held in assembled position within the opening 4: of the casing 1 by the said washer 11, which is sufliciently large to extend over the adjacent edge of the opening 4, and by the headed screw 12, mounted in the threaded socket 13 in the upper end of the key 5. Inasmuch, as the lug 30 extends up into the aperture 31 of the washer 11, the

washer 11 will turn with the key 5, when it turns, and thus assume all the friction of said turning, so that the screw 12 will be relieved of the same. The lower end of the key 5 has formed integral therewith, the brackets 14.-14 adapted to provide bearings for the pivotal mounting of the lever 15 having a circular finger plate 16 at one end and a tooth 17 at the other. The tooth 17 is adapted to engage severally the terminal recesses 19 and'20 and the intermediate recesses 21 formed in the lower edge 22 of the. casing 1. Adjacent the recesses 19 and 20 are the stops 23 and 2 1 respectively, that the recesses 19, 20 and 21 in the lower ec ge.

22 of the casing -1 by the coiled spring 25 bearing at one end against the lever 15, which has a pin 26 extending thereinto for holding that end of the spring 25, and bear- "ing at the other end against the finger piece 27 having a recess 28 therefor. This end of the spring 25 is secured within the recess 28. The finger piece 27 is formed integral with the key 5 and is circular in conformation.

The operation of the safety gas cock is effected by grasping with the fingers, the piece 27 and drawing thereto against the tension of the spring 25, the lever 15, thereby turning the same upon its fulcrum into the dotted line position illustrated in Fig. 3, whereby to withdraw the tooth 17 from the respective recess 19, 20 or 21 into which it has been engaged. Vfhereupon, the finger piece 27 of the key 5. is turned, if the cock is to be opened, into the position at right.

angles to that shown in Fig. 2, so that the channel 6 of the key 5 will aline with the channels 3 and 7 of the casing 1. Immediately the piece 27 arrives at the angle stated, the tooth 17 of the lever 15 will contact with the stop 23, which will arrest its further movement in that direction. The thumb then being withdrawn from the plate 16 of the lever 15, the same will automatically under the influence of the spring 25, cause the tooth 17 to engage the recess 19 adjacent the stop 23, whereby to lock the key 5 in the open position. In order to close the cock against the exit of the gas, the finger piece 27 and the plate 16 of the lever 15 are manipulated as before, whereupon the tooth 17 of the lever 15 will impinge against the stop 2 1- and plunge into the adj acent recess 20 by the like influences. The intermediate recesses 21 provide for the partial opening and locking of the key 5.

The tooth 17 will engage automatically any one of the recesses 21 in accordance with the desires and manipulation of the same by the operator.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

In a safety gas cock, a casing having a channel, a key having a finger piece for closing said channel, a plurality of recesses located in the lower edge of said. casing, a lever having a tooth adapted to engage any one of said recesses, whereby to lock said key in different positions, integral portions projecting from said casing, whereby to automatically stop the turning of said key in either open or closed position, a coiled spring disposed between the lever and the finger piece of said key, for holding said lever yieldingly within said recesses, a headed screw for holding the key in position, a washer having an aperture with straight sides, and said key having a lug adapted to fit in said aperture in the washer, whereby said washer will turn with said key torelieve the screw from any friction.

In testimony whereof I have afiiXed my signature in the presence of two witnesses.

GEORGE H. HARRIS.

Witnesses:

C. M. FAILEY, L. A. RIGGALL. 

